Ok, so when the UM2 print head is rebuilt to 2+, I would really like to have it bolt onto another printer carriage

I am thinking, since the rod bearings wouldn't be used, those plastic pieces could be replaced with a 3D printed one (or CNC'd)

I know for the print head to mount flush with another mount, it should either have a spacer or the replacement piece extrude a small distance outward. I was thinking two horizontal, 5 mm holes would be enough to secure it?

Just thinking out loud I know some of you have made some frankenstein ultimakers!

The problem is that only if you have the exact measurements of the mounting points you could create a CAD for it. So you need to at least provide a 2D drawing with some measurements for the holes and such before somebody could look into this. But I agree with Neotko, there is no better way to learn CAD than having a real project to work on

The free Start-Up/ Enthusiast licenses allow you to access Fusion 360 Ultimate with a yearly Free subscription. You can use this license if you are a small business making less than $100,000 per year (or equivalent), or if you're a hobbyist using Fusion 360 for non-commercial purposes.

There a many tutorials on You tube to assist you in making your first Model.

This is my first model after watching the tutorials.
A Snap together case for My Hictop Controller board.